noun, feminine/tʁi.ɡɔ.nɔ.me.tʁi/plural: trigonométries
trigonométrie is feminine in French.
trigonometry
Synonyms: trigo
Learned borrowing from New Latin trigōnometria, itself formed from Ancient Greek τρίγωνον (trígōnon, “triangle”) + μέτρον (métron, “measure”).